Rikatillsammans rekommenderar rebalansering sällan och det ligger mycket i det.
Här är en studie som undersökte hur ofta och vid vilka nivåer rebalansering bör ske.
Abstract i artikeln slutar med en intressant reflektion:
“Why does a relatively long time interval (and higher threshold) for rebalancing outperform a shorter time period (and lower threshold)? One, partial, explanation comes from the observation by various researchers including Poterba and Summers (1988) and Fama and French (1988), of positive short-term autocorrelation among stock returns and negative longer-term autocorrelation. To the extent that returns are positively correlated in the short run, investors can take advantage of momentum by sitting tight. In contrast, mean reversion in returns over 3-5 years confirms the efficacy of rebalancing about that often.”.